Nyquist Ariā - te pūtake ariā o te hangarau mōhiohio hou

whakatutukitanga torutoru kia kaha te awe te whanaketanga o te kōrero, me te mōhiohio hangarau, rite te ture tauwehe Nyquist. Na roto i te a nui, kua whai kororia i tenei pūtaiao to tatou whenua e kore e iti iho i te SP Queens, AS ranei Popov. Ko reira taea e mohiotia Kotelnikov waho Russia atu ara atu i roto i te fatherland.

Tenei rongo he tona whakamārama. ka Nyquist ture tauwehe te pūtake ariā mō te taputapu mamati hou katoa e whakamahia ana mō te kōrero. Kei te hāngai te reira i runga i te parau tumu o whakamamati tetahi tohu te whakapakoko ranei. Hangaia e te reira te tikanga mo te tātai o maha-hongere kōrero o te rua tohu. Nā ki te ture tauwehe Nyquist, ka taea e koe whakahoki ngangau me te "taretare" tohu, te hanga wātea i te mate o. Kei te nuinga o hāngai hoki technique cryptographic i runga i tenei ture tauwehe. Mahalo e taea kitea ia atu tono whai hua.

whanau te kaituhi o taua hiranga mo te whanaketanga o te reo irirangi mahi ariā i roto i 1908 i roto i Kazan. Ko tona papa he orometua whare wānanga, he mataaro pūkaha rongonui me te mathematician Aleksandr Petrovich Kotelnikov, na ka tae mai te reira ki ira, ko te pūtaiao i roto i Victor Alexandrovich "i roto i te toto". I puta ia i te Moscow Energy Institute, te tangata taitamariki haere ki te paetahi kura. Here ka e hiahia i roto i tona kaha hono hōkaiipurangi kaupapa. Mämä noa iho, ko ia pākiki pēhea te maha iwi i ia taha e taea te korero i te waea waea taua (e pokaia ki te māramatanga o tetahi, me te intelligibility kahore).

Whakapae e pā ana ki reira kua, a tae noa, pera tahuri reira i roto i, tino tika. Hei tauira, te Nyquist i 1928 fokotu'u e ki he rite ki te hawhe te wā o te auau teitei te huringa fatongia o te tohu āputa, ka taea te faaho'ihia mai te reira.

D = 1 / 2f,

te wahi:

D - riro tohu wa whakaaetia;

auau mōrahi F- roto i roto i te tūāwhiorangi tohu.

Nyquist āhua riro e te tohu oro waea he whānuitanga auau o 3 kHz, he reira taea ki te hihi i te auau o 6000 wa ia tuarua ki kahore he mate o ngā mōhiohio whai hua.

Taua whakapae maia me te pūmanawa tukua hītori hou o te pūtaiao i whenua Western ki te whakakapi i te ariā o "Nyquist Ariā" ingoa o te kaituhi. Nyquist ture tauwehe - e te te ingoa o te ture tauwehe o Nyquist i maha pukapuka Pākehā, me te Amerika. Heoi, ko reira kotahi mea ki te whakaaro, ara, ki te he te reira i te maia rawa a whakapumautia e te mahi, me tetahi atu mea - ki te whakamatau i te reira. rerekē Ariā i axioms whakapae ranei, e na roto i te whakamāramatanga titau tohu.

Tenei te mea e tika ana ki te utu takoha ki to tatou hoa Western. Manakē Nyquist i te tohu o "Nyquist Ariā" kahore tetahi tautohetohe.

Te kore te taumata makona nui o te matauranga o pāngarau teitei e taea ki te mārama me pēhea te faito whakatakoto Nyquist ture tauwehe. E hāngai ana te tohu kei runga i te pukangaru āwhiwhitanga e āta he maha Kotel'nikova (ona "rauhanga" e ngātere poto).

he pūtake ariā taua homai te roanga iti o te tohu pini tatou te whai wāhi ki te whakamahi i waea pūkoro i teie mahana, me te mati, me te waiho i raro ki te whakapakoko tukatuka, waiata, me te maha atu ngā momo o te ihirangi.